Roofing



May 22, 1934. J, H, BowMAN ROOFING Filed Dec.

INVENTOR wlmssses Patented May 22, 1934 1,959,619; ROOFING joseph H.Bowman, Pittsburgh, Pa., assignor to American Steel Bandv Company,Pittsburgh, Pa., a corporation of VNew Jersey Application-December 15,1931, serial No. 581,11*!` 3 claims. (o1. 10S-1a) This invention relatesto sheet-metal corrugated roofing, covered on one orVV both sides withprotective members, such'as sheets of asbestos, paper, felt, or otherlike materials, herein referred to generically as fabrics.

Among the objects ofthe invention are to provide inroong or siding ofthe clas's'above referred to means whereby the fasteners for attachingthe sheets to the structures are protected from weather exposure, whileat the same time effectively sealing the joints of adjacent sheets.Other objects will be apparent to those familiar with this art.

In the application of roofing or siding, of corrugated sheets of metal,even though the sheets are covered with a waterproof coating, such asasbestos or felt impregnated with asphalting or the like, the protectivecoating has necessarily been broken by the passage therethrough of nailsor bolts used for fastening the sheets to the building structure orfastening the meeting edges of the sheets to each other. Such openingsare corrosion foci and result in leakage. Also, in the erection ofcorrugated roofs or sidings the customary manner is to overlap theadjacent sheets at their meeting sides or edges and ends. Suchoverlapping joints are at best only partially weather tight. Air andrain are frequently driven by wind pressure through the resultant gapsunless considerable overlaps at the edge and ends of the sheets areprovided. Such wide overlaps are expensive, because of duplication ofthe material in such portions.

The present improvement obviates all these difficulties by providing anoverlapping of the fabric coating of the sheet at all joints, adapted tobe sealed down after the edge and end of the sheet have been nailed orbolted to the supporting structure or adjacent sheets, providing a coverfor the bolts or nails.

Referring to the drawing, Fig. l is a perspective View of a corner of aroofing sheet embodying the improvements herein referred to, andparticularly showing the free flap of overlying protecting `fabric asapplied to the sheet before it has been built into a roof or siding;Fig. 2 is a perspective view looking down the side of a building, orroof, the protective flaps of one sheet being raised; Fig. 3 is anenlarged partial section on the line III-III of Fig. 2, with the flap inpermanent position; Fig. 4 is an enlarged partial section on the lineIV-IV of Fig. 2, the flap being closed; and Fig. 5 is an enlargedpartial section on the line V-V of Fig. 2, also with the flap applied.

The invention is illustrated in the accompanying drawing as comprisingcorrugated metal7 sheets l, having an overlying coverof fabric 2, suchas felt, asbestos, paper, or the like, affixed to the upper side o-f theAsheet by any suitable means, as, for example, melted asphaltum or 6gthe like, but having a free flap 3 extending along one edge of the-sheet anda free flap-i extending along one'end of the sheet. The underside ofthe metal sheet 1 is protected by a coating of asphaltum orimpregnated fabric 5,' affixed over 65 its entire surface. Perforations6 are providedat the time of erection along the edges and ends of thesheets for the purpose of receiving screw bolts 7 for attaching thesheets to purlins 8. A

bracket 9, as illustrated in Fig. 5, may be used 7'0? to obviate thenecessity of perforating the flanges of the purlins themselves, orstandard clips well known in the art for fastening around the purlin,may be used.

The units of roofing embodying this invention to be used in covering abuilding will ordinarily be made up at a factory as shown in Fig. l.That is to say, the under sides of the metal sheets are completelycovered with the protecting elements 5, and the upper sides thereof arecovered with sheets of impregnated fabric 2, attached throughout thelgreater portion of the upper surface of the metal sheet, but unattachedto the metal for a few inches adjacent one or both sides and one or bothends of the metal sheet. Along the edges and ends just mentioned thefree fabric may extend beyond the metal for several inches, forming aflap adapted to overlap adjacent units to cover any fastenings therein.Consequently loose flaps of the covering fabric are provided on one edgeand one end, which, when turned back, expose the perforations 6 alongthat end or ends so that bolts, clips, or nails may be passed throughthe metal beneath the flap to secure the metal sheets to the buildingstructure, or to adjacent similar sheets.

After the attaching members have been thus positioned a suitable liquidadhesive, such as melted asphaltum, tar, or the like, is spread over theexposed portion of the outside of the metal 10() sheet, that is theportion underneath the iiaps, and over the adjoining surface of adjacentsheets, and the flaps 3 and 4 are pressed down into this adhesive so asto be firmly bound thereto, as will be obvious. asphaltum may also bespread over the flaps. The result is to completely protect all the boltsand bolt holes along the edges and ends and at the same time completelyseal all the joints between adjacent rooiing elements. The result is a110 Protective coatings of tar or building Wall'or roof which has allthe metal of the roofing sheets completely protected against exteriorexposure and which has all of the joints between sheets completelysealed against passage of air or water in any direction or under any anedge and an end of the metal sheet, along which edge and end the fabricis free from the metal sheet throughout an area sufficient to permitfastening members to be inserted through the sheetA Without puncturingthe fabric, the fabric extending a material distance beyond the saidedge and end of the sheet and being adapted to overlie and to becemented to adjacent similar units forming a roof or Wall.

2. A structural unit for roong or siding of buildings, comprising ametal sheet having on its inner side a suitable protective coatingthroughout, and having its outer side covered by a layer of protectivefabric permanently attached thereto throughout except for a narrow spacealong one side and one end of the metal sheet, said exposed edge and endof the metal sheet being perforated to receive fastening members, thefree fabric extending over and beyond said exposed portions of the metalsheet and being adapted to overlap and be cemented to adjacent similarsheets whereby to form a weather tight seal and to cover the perforatedAportions of the sheets after they are assembled in a buildingstructure.

3. 'In a roof or Wall construction, the combination of corrugated metalsheets, each sheet overlapping a similar sheet at one edge and beingoverlapped by a similar sheet at the other edge, each sheet overlappinga similar sheet at one end and being overlapped by similar sheets at theother end, and fastening means extending through overlapping sheets atthe edges and ends thereof, the upper side of each metal sheet having afabric cover cemented thereon, said cover extending beyond the metalsheet on one edge and one end and being unattached to the edge and endportions of the sheet through which the fastening members extend, suchextension overlying the said fastening means at the sides and ends ofthe sheets and being cemented to the overlapped adjacent sheet.

JOSEPH H. BOWMAN.

